Empire Magazine published in September 2008 their 500 Greatest Movies of All Time List, selected in a poll by over 10,000 Empire readers, 150 film makers and 50 film critics.
http://www.empireonline.com/500/
In 1999 the British Film Institute invited a large amount of people working within the film and television industry to take part in finding the 100 top British films of the 20th century.
Empire's 500 Greatest Movies of All Time
by m4milo